The Tembusu Tree Mystery (Crown Colony)

Singapore, 1947. Su Lin and Le Froy start married life renting the top floor of a house near Cathay Cinema, where Su Lin is the manager. The Chen family tries to deal with workers striking in support of trade unions - but when two of the striking workers are found dead in the cinema when the lights go up, with no sign of how they were killed, it's revealed they were there to meet Uncle Chen.